What Causes Tire Cupping on the Inside Tire of a Dual Wheel Setup
Published 09/06/2018
Question:
I have a 40’ PJ trailer dual axel and dual wheels. I have only 1 tire, back axel passenger side inner tire that is cupping and scalloping horriblly and it’s the only tire doing so. Could it be bearings? Suspension? Alignment? The tire in front of it outer tire isn’t damaged like the inner tire. What can it be?
asked by: Gomez
Expert Reply:
There could be several different causes for the tire cupping. Since it is only happening on the inner tire of your dual tire setup, have you checked the air pressure in the tire? If the air pressure is different between the two tires this could very likely be the cause of your cupping problem which means the tire is bouncing. The tires will need to be filled to the max psi listed on the sidewall.
If you have checked the air pressure then another potential cause is the balance of the wheel/tire. If the wheel/tire is out of balance more so than normal as trailers typically have a higher tolerance for out of balance wheels/tires then this could also be a cause of the tire cupping issue you are having.
The other potential cause is a worn out suspension. If the leaf springs, shackle straps, or equalizers look worn or damaged then they will need to be replaced. Let me know what you come back with and if there are any parts you need to help correct the issue. You may also want to take the trailer to a specialty shop to see if they can check the alignment of the axles for you.
Product Page this Question was Asked From
Loadstar ST205/75D15 Bias Trailer Tire - Load Range C
- Trailer Tires and Wheels
- Tire Only
- Bias Ply Tire
- Load Range C
- 205/75-15
- 15 Inch
- Kenda
more information >
Continue Researching
- Search Results: grease
- Search Results: axle grease
- Video: Hands-On with the Dexter Multi-Purpose Lithium Grease
- Video: Install: etrailer Electric Trailer Brakes on a 2019 Grand Design Reflection 150 Fifth Wheel
- Shop: etrailer Electric Trailer Brakes - Self-Adjusting - 12" - Left/Right Hand - 5.2K to 7K
- Shop: Provider ST235/80R16 Trailer Tire with Silver Vesper Mod Wheel - 8 on 6-1/2
- Shop: Dexter Multi-Purpose Lithium Grease - 14 oz. Cartridge
- Shop: Provider ST235/80R16 Trailer Tire with Black Mod Wheel - 8 on 6-1/2
- Shop: Trailer Hitch
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class V XD - 2"
- Shop: Suspension Enhancement
- Shop: Timbren Rear Suspension Enhancement System
- Video: Installation: Timbren Rear Suspension Enhancement System on a 2016 Ram 4500
- Shop: Trailer Wiring
- Search Results: trailer hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Video: Finding the Right Trailer Wiring Harness
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Brake Controller
- Q&A: What is the Best Grease for Trailer Bearings
- Search Results: trailer wiring
- Article: Trailer Wiring Diagrams
- Article: How to Measure Your Trailer Wheel Bolt Pattern
- Search Results: trailer tires and wheels
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Video: Air Lift LoadLifter 5000 Ultimate Rear Air Helper Springs with Internal Jounce Bumpers Review
- Search Results: suspension enhancement
- Article: How to Measure for Trailer Hitch Drop
- Q&A: Lug Nut Torque Chart for Trailer Wheels
on Trailer Tires and Wheels
